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Energy And Simple Machines
Test Description: Energy and Simple Machines
Instructions: Answer all questions to get your test result.
1) The kinetic energy of an object increases as its _____ increases
A
height
B
velocity
C
potential energy
D
specific heat
2) A slanted surface used to raise an object is a(n)
A
effort ramp
B
screw
C
inclined plane
D
efficiency board
3) A bar that is free to pivot about a fixed point is a
A
fulcrum
B
wedge
C
ramp
D
lever
4) The work output of a machine compared to the work input is the _____ of the machine.
A
power
B
efficiency
C
effort
D
resistance
5) The unit of power is the
A
watt
B
MA
C
joule
D
second
6) Which of the following CANNOT be done by a simple machine?
A
decrease the time it takes to do work
B
decrease the amount of work done
C
change the direction of a force
D
transfer energy from one location to another
7) How much work is done on an object that is moved 10 m with a force of 2 N?
A
50 J
B
2 J
C
20 J
D
5 J
8) An inclined plane wrapped around a cylindrical post is a
A
lever
B
block and tackle
C
screw
D
wedge
9) An arrangement of pulleys designed to reduce the effort force is called a
A
moveable pulley
B
fixed pulley
C
simple pulley
D
block and tackle
10) Potential energy because of height above Earth’s surface is called _____ potential energy.
A
mechanical
B
chemical
C
kinetic
D
gravitational
*select an answer for all questions
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